Is there a way i can prevent this script from damaging the same humanoid twice?

So i want to prevent this script from damaging the same humanoid twice while still being able to damage other ones, just not multiple times.

wait()

script.Parent.Touched:Connect(function(hit)

    local h = hit.Parent:FindFirstChild("Humanoid")

    local dmg = 15

    if h~=nil then


        h:TakeDamage(dmg)



        end



end)